Field Service Mechanic (Utility Trucks & Heavy Equipment)

About the role

Custom Truck One Source (CTOS) is a leading provider of specialty trucks, equipment, rentals, parts, and service solutions supporting the utility, telecommunications, and rail industries across North America. With a nationwide fleet of more than 10,000 units, we help customers build, maintain, and restore critical infrastructure. As a Field Service Mechanic based in Central Indiana, you will support customers throughout Central and Southern Indiana, with most service work performed within a 150‑mile radius of Indianapolis. You will work on bucket trucks, digger derricks, truck‑mounted cranes, utility and vocational trucks, hydraulic and electrical systems, and diesel‑powered equipment.

Responsibilities

• Diagnose, troubleshoot, and repair utility trucks, aerial devices, digger derricks, cranes, hi‑rail equipment, and related machinery.
• Perform preventative maintenance inspections and scheduled services.
• Troubleshoot hydraulic, electrical, diesel engine, CAN Bus, and LMI (Load Moment Indicator) systems.
• Read and interpret schematics, wiring diagrams, service manuals, and technical documents.
• Utilize diagnostic software and electronic troubleshooting tools.
• Complete repair orders, inspection reports, timecards, and service documentation accurately.
• Communicate repair status and recommendations to customers and management.
• Ensure repairs are completed safely, efficiently, and to manufacturer standards.
• Participate in company and manufacturer training programs.
• Travel overnight as needed to support customer requirements.

Requirements

• High School Diploma or GED.
• Valid driver's license.
• Must provide personal mechanic tools.
• Ability to work independently with minimal supervision.
• Strong customer service and communication skills.

Qualifications

• 5+ years of experience as a diesel, heavy equipment, utility equipment, crane, or field service mechanic.
• Strong hydraulic and electrical troubleshooting experience.
• Ability to read electrical schematics and hydraulic diagrams.
• Welding and fabrication experience preferred.
• Experience with diagnostic software such as Cummins INSITE, QuickServe, DTNA DiagnosticLink, or similar platforms.
• DOT, ANSI, or Dielectric testing experience is a plus.
• CDL Class B preferred.

Benefits

• Company service truck equipped with crane and welder.
• Company laptop and cell phone.
• Paid training and manufacturer certification programs.
• Opportunity to work independently while supporting a growing customer base.

Schedule

Monday‑Friday, weekends as needed, average 50 plus hours a week.